Exhibit 23.3

Data & Consulting Services Division of Schlumberger Technology Corporation  

Two Robinson Plaza, Suite 200

Pittsburgh, PA 15205

Tel: 412-787-5403

Fax: 412-787-2906

CONSENT OF DATA & CONSULTING SERVICES DIVISION OF SCHLUMBERGER

TECHNOLOGY CORPORATION

We, as independent petroleum engineers, hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our reserve reports relating to the proved reserves of gas and oil (including coal bed methane) of CONSOL Energy Inc. as of December 31, 2008, 2007 and 2006.

We further wish to advise that we are not employed on a contingent basis and that at the time of the preparation of our report, as well as at present, neither Data & Consulting Services Division of Schlumberger Technology Corporation nor any of its employees had, or now has, a substantial interest in CONSOL Energy Inc. or any of its subsidiaries, as a holder of its securities, promoter, underwriter, voting trustee, director, officer or employee.

DATA & CONSULTING SERVICES DIVISION OF SCHLUMBERGER TECHNOLOGY CORPORATION
By:	/s/ Charles M. Boyer
	Charles M. Boyer II, PG
	Advisor - Unconventional Reservoirs

Date: March 9, 2011